My GD kiddo is no more or less wild or whiny than my friends kids who are raised with tons of yelling, shame, spanking and unnecessary/unfair time outs (I'm not against time outs but I do think there are many occasions where using them is inappropriate and hurtful.)
The main difference I see between our kids is that my child is easier to correct and will even correct herself at times when she does get wild and disrespectful and that my kiddo seems more confident and attached. She doesn't cling to me the same way my friend's children do and in fact her children (ages 4 and 2) act more similar to how mine did at 1 when she went through a huge separation anxiety/clingy phase.
Granted, there are plenty of variables that could be the cause of these differences including simply having different personalities (my daughter handles her daddy's deployment worlds better than her children, especially her 4 year old, does) and having two children of course can lead to more problems simply due to sibling rivalry and wanting plenty of mommy time but I definitely prefer not yelling and not shaming. It creates a more peaceful space even when my 2 year old is still acting like a two year old complete with whining and tantrums, and plenty of wild times.
I don't practice GD to have a better behaved child at all times, I practice to help my child learn how to correct herself and understand why she's doing that.